in content/references/java-chassis/1.x/gitbook/gitbook-plugin-fontsettings/fontsettings.js [90:98]
function changeFontFamily(configName, e) {
if (e && e instanceof Event) {
e.preventDefault();
}
var familyId = getFontFamilyId(configName);
fontState.family = familyId;
saveFontSettings();
}